EP2057887B1 - Machine agricole - Google Patents

Machine agricole Download PDF

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Publication number
EP2057887B1
EP2057887B1 EP08015702A EP08015702A EP2057887B1 EP 2057887 B1 EP2057887 B1 EP 2057887B1 EP 08015702 A EP08015702 A EP 08015702A EP 08015702 A EP08015702 A EP 08015702A EP 2057887 B1 EP2057887 B1 EP 2057887B1
Authority
EP
European Patent Office
Prior art keywords
pressure
cylinder
collision protection
raising
agricultural machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP08015702A
Other languages
German (de)
English (en)
Other versions
EP2057887A3 (fr
EP2057887A2 (fr
Inventor
Manfred Mairhofer
Herbert Holzinger
Norbert Angleitner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alois Poettinger Maschinenfabrik GmbH
Original Assignee
Alois Poettinger Maschinenfabrik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Alois Poettinger Maschinenfabrik GmbH filed Critical Alois Poettinger Maschinenfabrik GmbH
Publication of EP2057887A2 publication Critical patent/EP2057887A2/fr
Publication of EP2057887A3 publication Critical patent/EP2057887A3/fr
Application granted granted Critical
Publication of EP2057887B1 publication Critical patent/EP2057887B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D75/00—Accessories for harvesters or mowers
    • A01D75/18—Safety devices for parts of the machines
    • A01D75/185—Avoiding collisions with obstacles

Definitions

  • the present invention relates to an agricultural machine, preferably mower, for attachment to a tractor, with at least one working unit, which can be brought via a lifting cylinder from a lowered working position in a raised headland and / or transport position, and a collision, by means of which the work unit at Approaching an obstacle viewed in the direction of travel is movable to the rear and / or up into an evasive position, wherein the collision protection has at least one Anfahrommeszylinder for holding the working unit in the working position and / or blocking the movement in the evasive position with obstacle-free normal operation, with a pressure accumulator is provided, which is coupled to the Anfahrommeszylinder such that the Anfahrtechnischszylinder is biased with pressure from the pressure accumulator in its locking the locking position, the Anfahrtechnischszylinder has a flow that with a Matterbuchnostiunq is closed until reaching a predetermined pressure.
  • Anfahrschen with pressure cylinder is the additional pressure cylinder connection required on the tractor, which is often present only in modern tractors of the youngest generation, however, is missing in older tractors. This makes it impossible so far to provide such Anfahrommeen with hydraulic cylinders as standard in a agricultural machine series, as many devices are of course also purchased by users who do not have such a state-of-the-art tractor.
  • the EP 19 25 198 which is state of the art under Art. 54 (3) EPC, shows a mowing machine, the mowing unit can be pivoted about a horizontal pivot axis by means of a lifting cylinder upwards, and can swing away about an upright pivot axis when driving on obstacles to the rear, wherein this Anfahrtechnischs pivot axis is locked by a hydraulic cylinder to a predetermined pressure.
  • the Anfahrtechnischszylinder should be coupled with a weight-relief cylinder to achieve an increased weight relief when approaching an obstacle.
  • the US 5,566,537 shows a mower whose mower is suspended on a laterally cantilevered support arm, wherein said support arm pivoted back about an upright axis and can be pivoted about a lying, pointing in the direction of travel axis upwards.
  • said support arm pivoted back about an upright axis and can be pivoted about a lying, pointing in the direction of travel axis upwards.
  • the said starting cylinder is in this case articulated on the support arm above the horizontal pivot axis, so that the bias of the Anfahrzylinders simultaneously causes a weight reduction of the mower.
  • the shows EP 0 512 602 a mower whose mower is suspended from a support arm that can be swung back around an upright axle.
  • the said support arm is in turn attached to a further support arm which can also be pivoted back about an upright axis relative to the trestle.
  • Both support arms are in this case acted upon with respect to their respective upright pivot axis by a hydraulic cylinder, which are connected in parallel and are biased from a pressure accumulator to keep the mower in the working position.
  • the present invention seeks to remedy this situation. It is the object of the invention to provide an improved agricultural machine of the type mentioned for attachment to a tractor, which avoids the disadvantages of the prior art and the latter develops in an advantageous manner. In particular, it is intended to provide an anti-start-up device which can be used independently of the tractor type and which allows a simple return of the working unit from the escape position back into the predetermined working position.
  • the pressure system of the collision safe self-sufficient, so that it can work without its own, separate connection to the tractor hydraulics.
  • the necessary for the reset pressurization of the Anfahr Anlagenszylinders is accomplished via otherwise existing on the agricultural machine pressure circuits.
  • the Anfahr Anlagenszylinder is reset and / or biased by means of a pressure accumulator, which is coupled to the Anfahrtechnischszylinder such that the Anfahrtechnischszylinder is biased with pressure from the pressure accumulator in its locking the locking position.
  • an accumulator may optionally be provided on machines without a lifting cylinder for the working aggregate an autarkic solution for a pressure medium controlled and in particular also self-resetting Anfahrtechnischssystem, which also does not require a separate pressure medium connection to the tractor.
  • the pressure accumulator is assigned a pressure setting device for setting the preload pressure, so that the pressure given by the pressure accumulator to the starting safety cylinder can be adapted to the conditions and requirements of use. It can be between the accumulator and the Anfahrtechnischszylinder in development of the invention, for example a manometer be provided. Alternatively or additionally, the pressure accumulator itself may be provided with a pressure adjusting device.
  • the pressure accumulator and / or the connection between pressure accumulator and Anfahrtechnischszylinder be in connection with a Be Shellan gleich with a hydraulic circuit of the tractor and / or another Compression circuit is connectable.
  • the system can also be coupled to the excavating cylinder via the said filling connection if necessary.
  • the Anfahrommeszylinder with the excavating cylinder with which the working unit can be raised in the headland or transport position, coupled such that the Anfahrommeszylinder is pressurized upon lifting of the working unit in said headland and / or transport position of the excavating cylinder ago. It is tapped, so to speak, the excavating cylinder or the pressure for the excavating cylinder for lifting the working unit to cyclically reset or bias the Anfahrtechnischszylinder. Every time the working aggregate is raised at the headland, the corresponding pressure is also applied to the starting safety cylinder.
  • This may be directly the pressure from the excavating cylinder, but it may also be a reduced pressure, for example, by a corresponding flow control element is provided in the connection between the excavating cylinder and Anfahrtechnischszylinder, which causes a corresponding pressure drop.
  • Erfindungsezeß is in the flow connection, which can be effected by a conduit, but also in the form of a channel or the same may be formed between the Anfahrtechnischszylinder and the excavating a locking cylinder for locking out backflow barrier provided, which may be advantageously designed in the form of a check valve ,
  • the non-return valve allows pressure medium from the excavating cylinder to the Anfahrtechnischszylinder, but not vice versa from Anfahrtechnischszylinder to the excavation cylinder.
  • the release pressure of the overpressure protection is adjustable, so that it can be precisely controlled how strong a start must be, so that the working unit can drive in its evasive position.
  • the overpressure sequence is returned to the excavating cylinder, in the pressure chamber, which leads in pressurization for lifting the working unit in the headland and / or transport position.
  • This can be advantageously used to that in addition to the actual evasive movement of the working unit, which is made possible by the movement of the Anfahr Anlagenszylinders, also an excavation over the excavation cylinder is generated, which often better even avoiding the obstacle is reached, since the regularly occurring obstacles in work such as rocks, rhizomes, etc. often only a very limited height have.
  • the return of the pressure medium discharged via the overpressure safety device can take place via the same line, via which the pressure medium from the excavation cylinder is also pressed into the approach safety cylinder during the return of the collision safety device.
  • this bypasses the pressure-controlled valve of the overpressure protection with a bypass, which is provided with a check valve, so that when filling the Anfahrtechnischszylinders the pressure-controlled valve does not hinder the filling process in the aforementioned manner.
  • Mower 1 shown comprises a frame 2 which is fixed to a trestle 3, which can be grown by means of a conventional three-point linkage 4 to a tractor 5.
  • trestle 3 which can be grown by means of a conventional three-point linkage 4 to a tractor 5.
  • trestle 3 which can be grown by means of a conventional three-point linkage 4 to a tractor 5.
  • saddled frame can be articulated via drawbars.
  • the frame 2 carries more or less under itself the working unit 7.
  • the rear mower 28 comprises two laterally projecting projecting working units 7, which are each articulated on cantilevered support arms 8, which are mounted on the aforementioned frame 2.
  • the support arms 8 are in this case hinged to support pieces 9, which are pivotable relative to the frame 2 to the right Anfahrtechnischsachsen 10 to the rear. Opposite said support pieces 9, the support arms 8 are pivotable about lying, pointing in the direction of travel Aushubachsen 11 upwards.
  • two excavating cylinders 12 are provided, which are hinged in a suitable manner on the one hand to the support arm 8 and on the other hand, for example, on the supporting piece 9 or another suitable frame part.
  • the working units 7 of the rear mower 28 are still downstream conditioner and / or cross conveyor 13, which are suspended in a corresponding manner on support arms.
  • the collision protection 15 each one of the corresponding Anfahrtechnischsachse 10 associated Anfahrtechnischszylinder 16, which is hinged in the illustrated embodiment, on the one hand to the support piece 9 and on the other hand to a fixed point on the frame 2 and the aforementioned Anfahrtechnischsachse 10 is spaced to have a lever arm in this regard.
  • the aforementioned Anfahrtechnischszylinder 16 holds the respective working unit 7 and the associated support arm 8 in normal operation in the Fig. 1 shown lateral transversely projecting working position.
  • the Anfahrtechnischszylinder 16 may change in length, whereby it extends in the drawn installation situation, thereby allowing a pivoting back of the working unit 7 in an evasive position.
  • the pressurization of the Anfahrtechnischszylinders 16 can hereby advantageously by means of in Fig. 2 shown pressure control device 17 are controlled.
  • the Anfahrtechnischszylinder 16 is designed as a single-acting cylinder whose pressurized chamber is in fluid communication with the two Aushubzylindern 12 via a suitable pressure line 18 and can be brought.
  • the two excavating cylinders 12 are connected in parallel with said pressure line 18, wherein the chamber is connected to the pressure line 18 of said excavating cylinders 12, which undergoes pressurization when lifting the working unit 7.
  • the pressure line 18 is normally shut off.
  • a pressure-controlled switching valve 20 is provided, which serves as overpressure protection 21.
  • the pressure prevailing in the Anfahr Anlagenszylinder 16 pressure is used as the control pressure. If this increases over a predetermined amount, the switching valve 20 is released, so that hydraulic fluid can flow out of the Anfahrtechnischszylinder 16. However, if said pressure does not reach the set threshold, the switching valve 20 remains in its blocking position, whereby the Anfahrtechnischszylinder 16 is held in its locking position.
  • the pressure line 18 has around the said pressure-controlled switching valve 20 around a bypass 22 which is provided with a check valve 23, the pressure medium flow from the Aushubzylindern 12 to the Anfahrtechnischszylinder 16 allows, but blocks or prevents a reverse pressure medium flow.
  • the Anfahrtechnischszylinder 16 is applied to each lifting the work units 7 in the headland or transport position of the excavation 12 ago with pressure, so that the Anfahrtechnischszylinder 16 in his the Collision protection 15 locking position is stretched. There remains the Anfahrtechnischszylinder 16 in normal operation, since an outflow of pressure fluid from the corresponding pressure chamber of the Anfahrtechnischszylinders 16 through the check valve 23 and the pressure-controlled switching valve 20 is prevented. However, if the working unit 7 moves to an obstacle, this leads to a corresponding increase in pressure in the Anfahrtechnischszylinder 16.
  • the Anfahr Anlagenszylinder 16 is biased by means of pressure from a pressure accumulator 24 ago in his the arrester 15 locking position.
  • said Anfahr Anlagenszylinder 16 is connected via a pressure line 18 with said accumulator 24, wherein between the pressure accumulator 24 and the Anfahrtechnischszylinder 16, a pressure control device in the form of a pressure gauge 25 is provided, by means of which the applied pressure can be controlled.
  • said pressure line 18 is provided with a filling port 26, via which the entire system can be filled with pressure medium.
  • the pressure accumulator 24 can basically be designed differently. In the illustrated embodiment, it is designed as a gas pressure accumulator so that pressurized gas, such as nitrogen, the desired pressure on the Anfahrtechnischszylinder 16 can be given.
  • the pressure accumulator 24 in this case likewise has a filling connection 27, via which pressurized gas can be introduced into the pressure accumulator 24.
  • FIGS. 2 and 3 show, the in FIGS. 2 and 3 system also be combined with each other.
  • the provision of the Anfahrtechnischszylinders 16 is ensured via the pressure accumulator 24 in normal operation, in addition, a return of the system is effected via the connection to the excavating cylinder 12 cyclically in the initial situation, which also creeping pressure losses can be compensated.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Harvester Elements (AREA)
  • Agricultural Machines (AREA)
  • Lifting Devices For Agricultural Implements (AREA)
  • Centrifugal Separators (AREA)
  • Soil Working Implements (AREA)
  • Catching Or Destruction (AREA)

Claims (6)

  1. Machine agricole, de préférence moissonneuse, à accoupler à un tracteur (5), avec au moins un appareil de travail (7) qui peut être amené par un vérin de levage (12) d'une position de travail abaissée à une position de fourrière et/ou de transport relevée, et une sécurité de percussion (15) au moyen de laquelle l'appareil de travail (7), lorsqu'il percute un obstacle, en regardant dans la direction de roulement, est déplaçable vers l'arrière et/ou vers le haut en une position d'écartement, où la sécurité de percussion (15) présente au moins un vérin de sécurité de percussion (16) pour retenir l'appareil de travail (7) dans la position de travail et/ou pour bloquer le mouvement dans la position d'écartement lors d'un fonctionnement normal sans obstacle, où un accumulateur de pression (24) est prévu qui est couplé au vérin de sécurité de percussion (16) de telle sorte que le vérin de sécurité de percussion (16) est précontraint par la pression de l'accumulateur de pression (24) dans sa position bloquant la sécurité de percussion (15), où le vérin de sécurité de percussion (16) présente un écoulement qui est fermé par une sécurité de surpression (21) jusqu'à l'atteinte d'une pression prédéfinie, caractérisée en ce que le vérin de sécurité de percussion (16) est couplé au vérin de levage (12) de telle sorte que le vérin de sécurité de percussion (16), lors du relevage de l'appareil de travail (7) dans la position de fourrière et/ou de transport est chargé en pression par le vérin de levage (12), où est prévu dans la liaison d'écoulement (18) entre le vérin de sécurité de percussion (16) et le vérin de levage (12) un blocage de reflux bloquant vers le vérin de levage (12), où l'écoulement du vérin de sécurité de percussion (16) est guidé dans le vérin de levage (12) dans sa chambre de pression, qui, lors d'une sollicitation en pression pour le relevage de l'appareil de travail (7) mène à la position de fourrière et/ou de transport.
  2. Machine agricole selon la revendication précédente, dans laquelle est associée à l'accumulateur de pression (24) une installation de réglage de pression pour le réglage de la pression de pré-contrainte.
  3. Machine agricole selon l'une des deux revendications précédentes, dans laquelle l'accumulateur de pression (24) et/ou la liaison entre l'accumulateur de pression (24) et le vérin de sécurité de percussion (16) est en liaison avec un raccord de remplissage (26) qui peut être relié à un circuit hydraulique du tracteur (5) et/ou un autre circuit d'alimentation en pression.
  4. Machine agricole selon la revendication précédente, dans laquelle le raccord de remplissage (26) peut être relié au vérin de levage (12).
  5. Machine agricole selon l'une des revendications précédentes, où la sécurité de surpression (21) présente une vanne de commutation (20) commandée par la pression qui est commandée par la pression régnant dans le vérin de sécurité de percussion (16).
  6. Machine agricole selon la revendication précédente, dans laquelle la vanne de commutation commandée par pression (20) est réglable quant à sa pression d'ouverture.
EP08015702A 2007-11-09 2008-09-05 Machine agricole Active EP2057887B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202007015633U DE202007015633U1 (de) 2007-11-09 2007-11-09 Landmaschine

Publications (3)

Publication Number Publication Date
EP2057887A2 EP2057887A2 (fr) 2009-05-13
EP2057887A3 EP2057887A3 (fr) 2009-11-04
EP2057887B1 true EP2057887B1 (fr) 2011-06-29

Family

ID=40342461

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08015702A Active EP2057887B1 (fr) 2007-11-09 2008-09-05 Machine agricole

Country Status (4)

Country Link
EP (1) EP2057887B1 (fr)
AT (1) ATE514327T1 (fr)
DE (1) DE202007015633U1 (fr)
DK (1) DK2057887T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010022246B4 (de) 2010-05-31 2022-05-19 Pöttinger Landtechnik Gmbh Landwirtschaftliches Anbaugerät
DE102014104379A1 (de) * 2014-03-28 2015-10-01 Claas Saulgau Gmbh Arbeitsgerät zum Ankuppeln an eine landwirtschaftliche Arbeitsmaschine
DE102014016183A1 (de) * 2014-11-03 2016-05-04 Alois Pöttinger Maschinenfabrik Gmbh Landmaschine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9100774A (nl) * 1991-05-06 1992-12-01 Zweegers & Zonen P J Maaimachine.
DE9320343U1 (de) * 1992-07-31 1994-12-01 Wittrock Hans Gmbh Zur Anordnung an einem Arbeitsfahrzeug vorgesehenes Arbeitsgerät
FR2719189B1 (fr) * 1994-04-29 1996-07-05 Kuhn Sa Faucheuse à dispositif de sécurité.
DE19921957A1 (de) * 1999-05-14 2000-11-16 Claas Saulgau Gmbh Steuerung für landwirtschaftliche Arbeitsmaschine
FR2875098B1 (fr) * 2004-09-15 2008-01-25 Noremat Sa Machine du genre faucheuse-debroussailleuse
NL1032946C2 (nl) * 2006-11-27 2008-05-28 Maasland Nv Bewerkingsinrichting.

Also Published As

Publication number Publication date
DE202007015633U1 (de) 2009-03-26
DK2057887T3 (da) 2011-10-03
EP2057887A3 (fr) 2009-11-04
EP2057887A2 (fr) 2009-05-13
ATE514327T1 (de) 2011-07-15

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